Search

CN-121993762-A - Wavelength conversion device, preparation method thereof and light emitting equipment

CN121993762ACN 121993762 ACN121993762 ACN 121993762ACN-121993762-A

Abstract

The embodiment of the application provides a wavelength conversion device which comprises a substrate, a reflecting layer and a wavelength conversion layer, wherein the reflecting layer is arranged on the surface of the substrate, and the wavelength conversion layer is arranged on the surface of a sintered silver layer, which is far away from the substrate. Wherein the reflecting layer is a sintered silver layer. The silver paste is coated on the substrate and the wavelength conversion layer respectively, the surface of the substrate coated with the silver paste and the surface of the wavelength conversion layer coated with the silver paste are bonded and then sintered to form the reflecting layer, the forming mode does not need to use adhesive on one hand, the stacking layer number is reduced, and on the other hand, the combination between the substrate and the wavelength conversion layer is more stable, and the falling-off situation is not easy to occur. In addition, the embodiment of the application also provides a preparation method of the wavelength conversion device and a light emitting device.

Inventors

  • LI QIAN
  • LI MAN
  • WANG YANGANG

Assignees

  • 深圳市绎立锐光科技开发有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (11)

  1. 1. A wavelength conversion device, comprising: a substrate; a reflecting layer arranged on the surface of the substrate and made of sintered silver, and The wavelength conversion layer is arranged on the surface, far away from the substrate, of the sintered silver layer, and the reflecting layer is formed by sintering silver paste between the surface of the substrate and the surface of the wavelength conversion layer and is respectively connected with the substrate and the wavelength conversion layer.
  2. 2. The wavelength conversion device according to claim 1, wherein the sintered silver layer is a high temperature sintered silver layer having a porosity of 18% -25%.
  3. 3. The wavelength conversion device according to claim 1, wherein the sintered silver layer is a low temperature sintered silver layer having a porosity of 10% to 17.5%.
  4. 4. A wavelength conversion device according to any one of claims 1 to 3, wherein the reflective layer further comprises microspheres, the microspheres being homogeneously dispersed within the reflective layer.
  5. 5. The wavelength conversion device according to claim 4, wherein the microspheres have a diameter of 20 μm to 50 μm.
  6. 6. A light emitting device, characterized in that the light emitting device comprises a laser light source and a wavelength conversion device according to any one of claims 1-5, wherein the laser light source emits excitation light to excite the wavelength conversion device to emit lasing light.
  7. 7. A method of manufacturing a wavelength conversion device according to any one of claims 1 to 5, comprising: Providing a substrate, a wavelength conversion layer and a silver paste, wherein the silver paste comprises silver particles and an organic carrier; coating one side surface of the substrate with the silver paste and then drying, and/or coating one side surface of the wavelength conversion layer with the silver paste and then drying; And bonding the surface of the substrate coated with the silver paste and the surface of the wavelength conversion layer coated with the silver paste and then sintering the bonded surfaces in a sintering furnace, or bonding the surface of the substrate coated with the silver paste and the surface of the wavelength conversion layer and then sintering the bonded surfaces in the sintering furnace, or bonding the surface of the substrate and the surface of the wavelength conversion layer coated with the silver paste and then sintering the bonded surfaces in the sintering furnace.
  8. 8. The method of manufacturing a wavelength conversion device according to claim 7, wherein the silver paste further comprises microspheres, the microspheres comprising 0.1wt% to 0.5wt% of the weight of the silver paste.
  9. 9. The method of manufacturing a wavelength conversion device according to claim 7, wherein the silver particles comprise nano silver particles and micro silver particles, the micro silver particles have a particle diameter of 1 μm to 4 μm, the nano silver particles have a particle diameter of 10nm to 100nm, and the nano silver particles account for 1wt% to 3wt% of the weight of the silver particles.
  10. 10. The method of manufacturing a wavelength conversion device according to claim 7, wherein the silver particles comprise micron silver particles having a particle size of 1 μm to 4 μm.
  11. 11. The method of manufacturing a wavelength conversion device according to claim 7, wherein the thickness of the silver paste applied to the surface of the substrate is 10 μm to 30 μm, and the thickness of the silver paste applied to the surface of the wavelength conversion layer is 10 μm to 20 μm.

Description

Wavelength conversion device, preparation method thereof and light emitting equipment Technical Field The application relates to the technical field of light sources, in particular to a wavelength conversion device, a preparation method thereof and a light-emitting device. Background At present, the laser fluorescence conversion type light source is widely applied to equipment such as LED illumination, stage lamps, car lamps, searchlight and the like, and has the advantages of high brightness, high-temperature stability and the like. The wavelength conversion device is a core component of the laser fluorescence conversion light source, and the performance of the wavelength conversion device plays a decisive role in the quality of the laser fluorescence conversion light source. Currently, wavelength conversion devices are typically composed of a substrate layer, an adhesive layer, a reflective layer, and a light emitting layer stacked in sequence. In the wavelength conversion device prepared by the method, the adhesion force between layers and the thermal expansion coefficient are not matched stably, the adhesion force between layers is poor, and the luminous layer is easy to fall off from the radiating substrate. And the interlayer structure is complex, the higher the matching difficulty of the thermal expansion coefficient is, the different degrees of shrinkage and expansion of each interlayer material can occur along with the change of the ambient temperature in the use process of the wavelength conversion device, and finally the device is invalid, so that adverse effects are brought to the reliability and long-term stability of the wavelength conversion device. Disclosure of Invention The application aims to provide a wavelength conversion device, a preparation method thereof and a light emitting device, so as to improve the problems. In a first aspect, an embodiment of the present application provides a wavelength conversion device, including a substrate, a reflective layer and a wavelength conversion layer, where the reflective layer is disposed on a surface of the substrate, the reflective layer is a sintered silver layer, the wavelength conversion layer is disposed on a surface of the sintered silver layer away from the substrate, and the reflective layer is formed by sintering silver paste between the surface of the substrate and the surface of the wavelength conversion layer and is respectively connected to the substrate and the wavelength conversion layer. In one embodiment, the sintered silver layer is a high temperature sintered silver layer having a porosity of 18% to 25%. In one embodiment, the sintered silver layer is a low temperature sintered silver layer having a porosity of 10% to 17.5%. In one embodiment, the reflective layer further comprises microspheres, the microspheres being uniformly dispersed within the reflective layer. In one embodiment, the microspheres have a diameter of 20 μm to 50 μm. In a second aspect, an embodiment of the present application further provides a light emitting device, including a laser light source and the above-mentioned wavelength conversion device, where the laser light source emits excitation light to excite the wavelength conversion device to emit laser light. In a third aspect, an embodiment of the present application further provides a method for preparing a wavelength conversion device, including: providing a substrate, a wavelength conversion layer and silver paste, wherein the silver paste comprises silver particles and an organic carrier; Coating silver paste on one side surface of the substrate and drying, and/or coating silver paste on one side surface of the wavelength conversion layer and drying; Bonding the surface coated with silver paste of the substrate and the surface coated with silver paste of the wavelength conversion layer, and then placing the bonded surface in a sintering furnace for sintering to obtain the silver paste; Or bonding the surface coated with silver paste of the substrate and the surface of the wavelength conversion layer, and then placing the bonded surface in a sintering furnace for sintering to obtain the silver paste; or bonding the surface of the substrate and the surface of the wavelength conversion layer coated with silver paste, and sintering in a sintering furnace to obtain the silver paste. In one embodiment, the silver paste further comprises microspheres, the microspheres comprising 0.1wt% to 0.5wt% of the weight of the silver paste. In one embodiment, the silver particles comprise nano-silver particles and micro-silver particles, wherein the particle size of the micro-silver particles is 1 μm-4 μm, the particle size of the nano-silver particles is 10nm-100nm, and the nano-silver particles account for 1wt% to 3wt% of the weight of the silver paste. In one embodiment, the silver particles comprise micron silver particles having a particle size of 1 μm to 4 μm. In one embodiment, the thickness of the silver p